One problem related to abs brake fail has been reported for the 2002 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 GMC Sierra 2500 based on all problems reported for the 2002 Sierra 2500.
Abs brake sensor failure. At low speeds the abs work even when wheels are not locked up. The first time I experienced this was pulling a 7000lb trailer. I had to divert the truck and trailer onto the shoulder to avoid plowing into traffic in front of me. This appears to be a very expensive repair to make, replacing the front wheel hub assemblies. Currently we have had to disconnect one of the abs sensors to keep the abs from activating.